The problem QR codes solve
For decades, the knock on direct mail was that you couldn't measure it. You mailed a few hundred postcards, business ticked up, and you hoped the two were connected. There was no clean line from a specific card to a specific result.
A QR code closes that gap. When someone scans the code on your postcard, that scan is a recorded event — a data point you can count, time-stamp, and tie back to the drop that produced it.
What a scan tells you
At a basic level, a scan tells you three things: that the card prompted action, roughly when it happened, and how many people did it. Watch the timing and you'll learn how long after a drop responses arrive — useful for planning the next one.
Tie that scan to something unique to the recipient — a personal URL printed on the card, or a QR code that resolves to a per-recipient link, which is how CardCadence does it — and you learn one more crucial thing: who scanned. That turns "the spring drop got some scans" into "these specific overdue patients re-engaged" — which you can act on directly.
What it can't tell you
It's worth being honest about the limits. A QR code can't tell you why someone didn't scan, and it doesn't capture the people who saw your card, were influenced by it, and later called or walked in without scanning. So a scan count is a floor on your response, not the whole story.
It also can't read intent. A scan means interest, not a guaranteed booking — though if the code leads straight to your booking page, the distance between the two gets very short.
Why it still changes everything
Even with those limits, trackable mail is a step change. It moves you from "I think mail works for us" to "this drop earned this many scans at this cost," which is the foundation for getting better. You can compare offers, compare sizes, compare lists — and keep what wins.
On CardCadence, every postcard design ships with a QR code by default, and it resolves to a link unique to the recipient, so the tracking isn't an add-on you configure. (CardCadence does not print a personal URL on the card — the QR is the tracked path.) It's just how the mail works, included in the per-card price.